Press with plate type frame



June 16,1942.

w. ERNST PRESS WIT?! PLATE'TYPE ERNIE. v

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Atzom xs' j Patented June 16, 1942 PRESS WITH PLATE TYPE FRAIHE WalterErnst, Mount Gilead, Ohio, assignor to The Hydraulic DevelopmentCorporation, Inc.,

a corporation Delaware Application April 8, 1938, Serial No. 200,964

1 Claim.

This invention relates to presses, and in particular, to frameconstructions for presses.

One object of this invention is to provide a press having a framewherein the head, bed and side members engage one another by means of aplurality of projections or lugs.

Another object is to provide a press wherein the head and bed areprovided with projections or lugs passing through recesses in plate-likeside members so that the thrust of the press is transferred to the sidemembers in straight lines longitudinally along the side members, andsubstantially without transverse thrust components.

Another object is to provide a press having a head and bed which areprovided with lugs seated in correspondingly shaped recesses orapertures in plate-like side members forming the strain elementsinterconnecting the head and bed. so that the working thrusts aretransferred to the plate-like side members in substantially rectilineardirections without oblique or transverse thrust components.

In the drawings:

Figure 1 is a front elevation of a press having a frame constructionaccording to the invention.

Figure 2 is a right-hand side elevation of the press shown in Figure 1.

Figure 3 is a horizontal section along the line 33 in Figure 1.

Figure 4 is a horizontal section along the line 4-4 in Figure 1.

Figure 5 is a front elevation of a modification of Figure 1, with adownwardly moving plunger.

In general, the press of this invention includes a head and a bed havingprojecting lugs engaging correspondingly shaped recesses in the sidemembers. These sidemembers are in the form of heavy steel plates, andreceive the thrusts created by the action of the platen of the press. Inthe present invention these lugs pass entirely through the side platesand thereby transmit the thrusts in longitudinal straight lines to theside members. In this manner ob lique thrusts or outward components areeliminated, so that there is no tendency for the side members to bendoutwardly or become distorted during the operation of the press. Wherethe lugs on the head or bed pass only partially through the side platesand not entirely through them, an eccentric condition exists as to thelines of stress so that the end portions of the side plates tend to bepulled outwardly. In the present construction, however, where the lugspass entirely through the side plates, the result is a straight pull onthe side plates and therefore there is no tendency to distort them.

Referring to the drawings in detail, Figures 1 and 2 show one embodimentof this invention, employing an upwardly-acting plunger. -The press ofFigure 1 consists of a bed It) and a head ll having lugs or projectionsl2 and i3, respectively. These lugs engage recesses I4 and i5, re-

spectively near the lower and upper ends of the frame side members IS.The stresses are transmitted through these connections between the lugsl2 and I3 and the recesses l4 and t5, the parts being nominally heldtogether by the cap screws II. The latter, however, are not dependedupon to transmit thrust but merely serve as connecting members to holdthe parts in assembly. In the press shown in Figures 1 and 2 the lugs l2and I3 are disposed substantially in intermediate positions at the endsof the bed l0 and head II.

The bed It) is provided with a cylinder l8, within which a plunger l9reciprocates to move a platen 20 secured thereto. The platen 20 movesupwardly against the head H in order to perform a pressing stroke, andis guided in its reciprocation by side plates 2| with beveled'portions22 engaging the correspondingly beveledportions 23 at the corners of theplaten 20 (Figure 4). The side plates 2| are secured by the cap screws24 in recesses 25 in the side members l6. Leakage around the mainplunger l9 ls-prevented by means of aconventional gland-construction,generally designated 26. The details of the control mechanism of thepress form no part of the present invention, and any desiredmain plunger46 is mounted in a cylinder 41 within the head I I rather than withinthe bed ID, as in the previously illustrated constructions.

The platen 48, therefore, moves in a downward direction instead of in anupward direction, as in the other forms of presses hitherto described.

It will be understood that I desire to comprehend within my inventionsuch modifications as come within the scope of the claim and theinvention.

Having thus fully described my invention,

what mum as'new and desire to secure by Letters Patent, is:

A vertical press comprising a press head. a press bed, and side members,said side members having recessed portions with the openings of saidrecesses directed towards the respective planes of the vertical edgesthereof, said head and bed each being reduced at their sides to provideprojections lying intermediately of their tops and bottoms, and verticalside walls above and below said projections, said projections extendingentirely through the respective recessed portions of said side membersand adapted to be supported by walls of said recesses, and said verticalside walls above and below said projections being entirely in contactwith said side members.

WALTER ERNST.

